they don’t look at their prime, at least from what i can see. Did you just plant that tree this year, and was it just delivered from out of state?
reason i ask is because our mature hj trees’ fruits are still far behind in reaching their prime, and can safely presume that juju trees here in las vegas should ripen sooner(or not much later) than fruits on trees in WA.
injury to fruits may also result in premature ‘ripening’, wherein fruits turn color/texture due to trauma.
but if none of the above, it is also possible for jujus to bear duds as younger trees due to various factors(unfavorable root-to-stem ratio, among other things that compromise recently planted trees)